Multi-parameter distributed fiber sensing with higher-order optical and acoustic modes

We propose a novel multi-parameter sensing technique based on a Brillouin optical time domain reflectometry in the elliptical-core few-mode fiber, using higher-order optical and acoustic modes. Multiple Brillouin peaks are observed for the backscattering of both the LP mode and LP mode. We character...

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Bibliographic Details
Published in:Optics letters 2019-03, Vol.44 (5), p.1096-1099
Main Authors: Fang, Jian, Milione, Giovanni, Stone, Jeffery, Peng, Gaozhu, Li, Ming-Jun, Ip, Ezra, Li, Yaowen, Ji, Philip N, Huang, Yue-Kai, Huang, Ming-Fang, Murakami, Shuji, Shieh, William, Wang, Ting
Format: Article
Language:English
Subjects:
Acoustics
Backscattering
Detection
Parameters
Reflectometry
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Summary:We propose a novel multi-parameter sensing technique based on a Brillouin optical time domain reflectometry in the elliptical-core few-mode fiber, using higher-order optical and acoustic modes. Multiple Brillouin peaks are observed for the backscattering of both the LP mode and LP mode. We characterize the temperature and strain coefficients for various optical-acoustic mode pairs. By selecting the proper combination of modes pairs, the performance of multi-parameter sensing can be optimized. Distributed sensing of temperature and strain is demonstrated over a 0.5-km elliptical-core few-mode fiber, with the discriminative uncertainty of 0.28°C and 5.81 με for temperature and strain, respectively.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.44.001096